diff options
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/lib/uaccess_mvcos.c | 22 | ||||
| -rw-r--r-- | arch/s390/lib/uaccess_std.c | 36 |
2 files changed, 42 insertions, 16 deletions
diff --git a/arch/s390/lib/uaccess_mvcos.c b/arch/s390/lib/uaccess_mvcos.c index 86c96d6c191a..121b2935a422 100644 --- a/arch/s390/lib/uaccess_mvcos.c +++ b/arch/s390/lib/uaccess_mvcos.c | |||
| @@ -35,7 +35,7 @@ size_t copy_from_user_mvcos(size_t size, const void __user *ptr, void *x) | |||
| 35 | tmp1 = -4096UL; | 35 | tmp1 = -4096UL; |
| 36 | asm volatile( | 36 | asm volatile( |
| 37 | "0: .insn ss,0xc80000000000,0(%0,%2),0(%1),0\n" | 37 | "0: .insn ss,0xc80000000000,0(%0,%2),0(%1),0\n" |
| 38 | " jz 4f\n" | 38 | " jz 7f\n" |
| 39 | "1:"ALR" %0,%3\n" | 39 | "1:"ALR" %0,%3\n" |
| 40 | " "SLR" %1,%3\n" | 40 | " "SLR" %1,%3\n" |
| 41 | " "SLR" %2,%3\n" | 41 | " "SLR" %2,%3\n" |
| @@ -44,13 +44,23 @@ size_t copy_from_user_mvcos(size_t size, const void __user *ptr, void *x) | |||
| 44 | " nr %4,%3\n" /* %4 = (ptr + 4095) & -4096 */ | 44 | " nr %4,%3\n" /* %4 = (ptr + 4095) & -4096 */ |
| 45 | " "SLR" %4,%1\n" | 45 | " "SLR" %4,%1\n" |
| 46 | " "CLR" %0,%4\n" /* copy crosses next page boundary? */ | 46 | " "CLR" %0,%4\n" /* copy crosses next page boundary? */ |
| 47 | " jnh 5f\n" | 47 | " jnh 4f\n" |
| 48 | "3: .insn ss,0xc80000000000,0(%4,%2),0(%1),0\n" | 48 | "3: .insn ss,0xc80000000000,0(%4,%2),0(%1),0\n" |
| 49 | " "SLR" %0,%4\n" | 49 | " "SLR" %0,%4\n" |
| 50 | " j 5f\n" | 50 | " "ALR" %2,%4\n" |
| 51 | "4:"SLR" %0,%0\n" | 51 | "4:"LHI" %4,-1\n" |
| 52 | "5: \n" | 52 | " "ALR" %4,%0\n" /* copy remaining size, subtract 1 */ |
| 53 | EX_TABLE(0b,2b) EX_TABLE(3b,5b) | 53 | " bras %3,6f\n" /* memset loop */ |
| 54 | " xc 0(1,%2),0(%2)\n" | ||
| 55 | "5: xc 0(256,%2),0(%2)\n" | ||
| 56 | " la %2,256(%2)\n" | ||
| 57 | "6:"AHI" %4,-256\n" | ||
| 58 | " jnm 5b\n" | ||
| 59 | " ex %4,0(%3)\n" | ||
| 60 | " j 8f\n" | ||
| 61 | "7:"SLR" %0,%0\n" | ||
| 62 | "8: \n" | ||
| 63 | EX_TABLE(0b,2b) EX_TABLE(3b,4b) | ||
| 54 | : "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2) | 64 | : "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2) |
| 55 | : "d" (reg0) : "cc", "memory"); | 65 | : "d" (reg0) : "cc", "memory"); |
| 56 | return size; | 66 | return size; |
diff --git a/arch/s390/lib/uaccess_std.c b/arch/s390/lib/uaccess_std.c index 9a4d4a29ea79..f44f0078b354 100644 --- a/arch/s390/lib/uaccess_std.c +++ b/arch/s390/lib/uaccess_std.c | |||
| @@ -35,25 +35,35 @@ size_t copy_from_user_std(size_t size, const void __user *ptr, void *x) | |||
| 35 | tmp1 = -256UL; | 35 | tmp1 = -256UL; |
| 36 | asm volatile( | 36 | asm volatile( |
| 37 | "0: mvcp 0(%0,%2),0(%1),%3\n" | 37 | "0: mvcp 0(%0,%2),0(%1),%3\n" |
| 38 | " jz 5f\n" | 38 | " jz 8f\n" |
| 39 | "1:"ALR" %0,%3\n" | 39 | "1:"ALR" %0,%3\n" |
| 40 | " la %1,256(%1)\n" | 40 | " la %1,256(%1)\n" |
| 41 | " la %2,256(%2)\n" | 41 | " la %2,256(%2)\n" |
| 42 | "2: mvcp 0(%0,%2),0(%1),%3\n" | 42 | "2: mvcp 0(%0,%2),0(%1),%3\n" |
| 43 | " jnz 1b\n" | 43 | " jnz 1b\n" |
| 44 | " j 5f\n" | 44 | " j 8f\n" |
| 45 | "3: la %4,255(%1)\n" /* %4 = ptr + 255 */ | 45 | "3: la %4,255(%1)\n" /* %4 = ptr + 255 */ |
| 46 | " "LHI" %3,-4096\n" | 46 | " "LHI" %3,-4096\n" |
| 47 | " nr %4,%3\n" /* %4 = (ptr + 255) & -4096 */ | 47 | " nr %4,%3\n" /* %4 = (ptr + 255) & -4096 */ |
| 48 | " "SLR" %4,%1\n" | 48 | " "SLR" %4,%1\n" |
| 49 | " "CLR" %0,%4\n" /* copy crosses next page boundary? */ | 49 | " "CLR" %0,%4\n" /* copy crosses next page boundary? */ |
| 50 | " jnh 6f\n" | 50 | " jnh 5f\n" |
| 51 | "4: mvcp 0(%4,%2),0(%1),%3\n" | 51 | "4: mvcp 0(%4,%2),0(%1),%3\n" |
| 52 | " "SLR" %0,%4\n" | 52 | " "SLR" %0,%4\n" |
| 53 | " j 6f\n" | 53 | " "ALR" %2,%4\n" |
| 54 | "5:"SLR" %0,%0\n" | 54 | "5:"LHI" %4,-1\n" |
| 55 | "6: \n" | 55 | " "ALR" %4,%0\n" /* copy remaining size, subtract 1 */ |
| 56 | EX_TABLE(0b,3b) EX_TABLE(2b,3b) EX_TABLE(4b,6b) | 56 | " bras %3,7f\n" /* memset loop */ |
| 57 | " xc 0(1,%2),0(%2)\n" | ||
| 58 | "6: xc 0(256,%2),0(%2)\n" | ||
| 59 | " la %2,256(%2)\n" | ||
| 60 | "7:"AHI" %4,-256\n" | ||
| 61 | " jnm 6b\n" | ||
| 62 | " ex %4,0(%3)\n" | ||
| 63 | " j 9f\n" | ||
| 64 | "8:"SLR" %0,%0\n" | ||
| 65 | "9: \n" | ||
| 66 | EX_TABLE(0b,3b) EX_TABLE(2b,3b) EX_TABLE(4b,5b) | ||
| 57 | : "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2) | 67 | : "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2) |
| 58 | : : "cc", "memory"); | 68 | : : "cc", "memory"); |
| 59 | return size; | 69 | return size; |
| @@ -67,16 +77,22 @@ size_t copy_from_user_std_small(size_t size, const void __user *ptr, void *x) | |||
| 67 | asm volatile( | 77 | asm volatile( |
| 68 | "0: mvcp 0(%0,%2),0(%1),%3\n" | 78 | "0: mvcp 0(%0,%2),0(%1),%3\n" |
| 69 | " "SLR" %0,%0\n" | 79 | " "SLR" %0,%0\n" |
| 70 | " j 3f\n" | 80 | " j 5f\n" |
| 71 | "1: la %4,255(%1)\n" /* %4 = ptr + 255 */ | 81 | "1: la %4,255(%1)\n" /* %4 = ptr + 255 */ |
| 72 | " "LHI" %3,-4096\n" | 82 | " "LHI" %3,-4096\n" |
| 73 | " nr %4,%3\n" /* %4 = (ptr + 255) & -4096 */ | 83 | " nr %4,%3\n" /* %4 = (ptr + 255) & -4096 */ |
| 74 | " "SLR" %4,%1\n" | 84 | " "SLR" %4,%1\n" |
| 75 | " "CLR" %0,%4\n" /* copy crosses next page boundary? */ | 85 | " "CLR" %0,%4\n" /* copy crosses next page boundary? */ |
| 76 | " jnh 3f\n" | 86 | " jnh 5f\n" |
| 77 | "2: mvcp 0(%4,%2),0(%1),%3\n" | 87 | "2: mvcp 0(%4,%2),0(%1),%3\n" |
| 78 | " "SLR" %0,%4\n" | 88 | " "SLR" %0,%4\n" |
| 79 | "3:\n" | 89 | " "ALR" %2,%4\n" |
| 90 | "3:"LHI" %4,-1\n" | ||
| 91 | " "ALR" %4,%0\n" /* copy remaining size, subtract 1 */ | ||
| 92 | " bras %3,4f\n" | ||
| 93 | " xc 0(1,%2),0(%2)\n" | ||
| 94 | "4: ex %4,0(%3)\n" | ||
| 95 | "5:\n" | ||
| 80 | EX_TABLE(0b,1b) EX_TABLE(2b,3b) | 96 | EX_TABLE(0b,1b) EX_TABLE(2b,3b) |
| 81 | : "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2) | 97 | : "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2) |
| 82 | : : "cc", "memory"); | 98 | : : "cc", "memory"); |